NEC Xen Master Programming Manual page 392

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N
1. This memory block is controlled by MB 4-57 if calls are to be CO or Telephone ring.
2. This memory block is applicable for main software Release 4.0 and above.
The Ring Patterns are shown in the table below:
Pattern
A
B
C
D
E
F
G
H
NIL
1 - 374
0s 1s 2s 3s
No Ring
s= seconds
4s 5s 6s
CO Ringing Pattern Selection for Telephone Mode
Xen Master & Xen Axis